{"id":3718,"date":"2015-10-17T06:41:53","date_gmt":"2015-10-17T06:41:53","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=3718"},"modified":"2015-10-26T05:59:42","modified_gmt":"2015-10-26T05:59:42","slug":"deux-celebres-galaxies-encadrent-letoile-mirach","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/10\/17\/deux-celebres-galaxies-encadrent-letoile-mirach\/","title":{"rendered":"Deux c\u00e9l\u00e8bres galaxies encadrent l’\u00e9toile Mirach"},"content":{"rendered":"

En r\u00e9alisant un \u00e9tonnant clich\u00e9 \u00e0 grand champ centr\u00e9 sur Mirach, l’astrophotographe Malcom Park est arriv\u00e9 \u00e0 r\u00e9unir les galaxies d’Androm\u00e8de et du Triangle.<\/strong><\/p>\n

Sortir des sentiers battus : \u00e0 l’heure des appareils photos num\u00e9riques de plus en plus performants, les astrophotographes doivent sans cesse innover s’ils veulent que leurs images soient remarqu\u00e9es.<\/p>\n

\"m31_m33\"<\/a><\/p>\n

Malcom Park<\/a> l’a bien compris : ce banquier canadien \u00e0 la retraite qui fut longtemps pr\u00e9sident de la\u00a0North York Astronomical Association<\/em> (NYAA<\/a>) ne se contente pas d’assouvir sa passion pour l’astrophotographie en accumulant des images c\u00e9lestes classiques, mais cherche chaque fois \u00e0 magnifier ses prises de vues par des cadrages in\u00e9dits.<\/p>\n

Comment r\u00e9aliser une \u00e9ni\u00e8me photographie de la c\u00e9l\u00e8bre galaxie d’Androm\u00e8de<\/a> (Messier 31) qui puisse encore attirer les regards blas\u00e9s ? Malcom Park a fait le choix du grand champ, montrant M 31 au milieu des \u00e9toiles, en compagnie de M 33 et de la brillante \u00e9toile Mirach.<\/p>\n

Le clich\u00e9 ci-dessus est un assemblage de 3 images : le champ d’\u00e9toiles a \u00e9t\u00e9 saisi avec un objectif de 50 mm de focale alors que chacune des galaxies est photographi\u00e9e \u00e0 l’aide d’une lunette astronomique<\/a> de 80 mm de diam\u00e8tre. Au centre on trouve une \u00e9toile g\u00e9ante rouge de magnitude 2 appel\u00e9e Mirach (ou Beta Andromedae<\/em>). Elle est encadr\u00e9e par deux superbes galaxies spirales : \u00e0 gauche la galaxie d’Androm\u00e8de<\/a> (Messier 31), \u00e0 droite la galaxie du Triangle<\/a> (Messier 33).<\/p>\n","protected":false},"excerpt":{"rendered":"

En r\u00e9alisant un \u00e9tonnant clich\u00e9 \u00e0 grand champ centr\u00e9 sur Mirach, l’astrophotographe Malcom Park est arriv\u00e9 \u00e0 r\u00e9unir les galaxies d’Androm\u00e8de et du Triangle. Sortir des sentiers battus : \u00e0 l’heure des appareils photos num\u00e9riques de plus en plus performants, les astrophotographes doivent sans cesse innover s’ils veulent que leurs images soient remarqu\u00e9es. Malcom Park … Continuer la lecture de Deux c\u00e9l\u00e8bres galaxies encadrent l’\u00e9toile Mirach<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":3719,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[84],"tags":[330,1261,1260,331,1262,1263],"class_list":["post-3718","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciel-etoile","tag-galaxie-dandromede","tag-galaxie-du-triangle","tag-malcom-park","tag-messier-31","tag-messier-33","tag-mirach"],"yoast_head":"\nDeux c\u00e9l\u00e8bres galaxies encadrent l'\u00e9toile Mirach<\/title>\n<meta name=\"description\" content=\"En r\u00e9alisant un \u00e9tonnant clich\u00e9 \u00e0 grand champ centr\u00e9 sur Mirach, l'astrophotographe Malcom Park est arriv\u00e9 \u00e0 r\u00e9unir les galaxies d'Androm\u00e8de et du Triangle.\" \/>\n<meta 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